Makes about 10-12 cookies.,Preheat oven to 350°F.,Add lime juice to milk and let curdle a few minutes.,Combine mint leaves, lime zest, sugar, and vegetable shortening in a processor, pulse a few times. Add curdled milk and process until smooth, with flecks of zest and mint leaves visible.,Combine flour, baking soda, and salt in a large bowl. Add processed mixture and blend with fork until mixture is evenly crumbly. Use hands to form a ball. At this point, you can refrigerate the dough for up to 24 hours.,______,Bake for 16-18 minutes, or until cooked through and golden on the edges.